Gutters · Osceola County
Gutters in Osceola County, FL
NOAA Atlas 14 puts the 5-minute rainfall rate in a 10-year storm at 8.71 inches an hour at Orlando, and Osceola County sits next door to that station. A short burst like that fills a gutter faster than a long soaking rain does. Size the gutter for the burst, point the downspouts away from the wall, and clean before June.
Updated October 2026
Our work
Gutters in Osceola County, in short
Kissimmee's 52.57 inches of yearly rain falls hard in summer, with 24.77 inches in June through August. Size gutters for the short burst. Florida code requires gutters on eaves under 6 inches deep, and downspouts must discharge at least 1 foot from the wall.
Local rainfall
How hard it rains in Osceola County
The Kissimmee station recorded 52.57 inches of rain a year in the 1991–2020 normals. Of that, 24.77 inches came in June through August, which is 47 percent of the year. Kenansville is wetter overall at 54.88 inches, but only 42 percent of it falls in those three months.
For comparison, Orlando averages 51.45 inches a year, and June through September brings 29.57 inches of it. That is about 57 percent of the annual total landing in four months. Your gutters do most of their work in one season.
Water covers 11.9 percent of the county's area, and Hurricane Ian in 2022 caused historic freshwater flooding near Runnymede Lake in St. Cloud and Mill Slough in Kissimmee. Gutters do not stop flooding. They only decide where roof water lands before the ground has a chance to take it.
Gutter sizing
Sizing gutters and downspouts for a fast burst
Florida's plumbing code sizes horizontal gutters by the flow coming off the roof. A 5-inch half-round gutter at a 1/8 inch per foot slope carries 74 gallons a minute. A 6-inch gutter carries 110.
By the code's own table, the 6-inch size moves about 49 percent more water than the 5-inch. In a county where 60.5 percent of homes are single-family detached, most with a long, simple roof edge, that upgrade often costs little extra effort at install.
Downspouts matter as much as the gutter. Per the table, a 3-inch round leader carries 92 gallons a minute, while a 4-inch round carries 192. A roof that sheds water from a tall wall onto the roof below needs extra capacity, since the code adds half of that wall's area to the roof's catchment.
Which design basis you choose shifts the result considerably. Near The Villages, a 6-inch gutter serves about 2,671 square feet on a 1-hour, 100-year basis but only about 1,107 on the 5-minute burst. Ask your installer which basis the quote uses.
Florida code
Code rules for gutters and downspout discharge
With a median build year of 2002 and 27.4 percent of homes built in 2010 or later, many Osceola County houses went up under rules that already carried this requirement. Older homes, the 11.3 percent built before 1980, may have no gutters at all or short downspouts.
Residential gutters must be metal or approved plastic, with lapped, soldered or caulked joints, fastened with corrosion-resistant hardware. Check with the Osceola County Building Office, or the City of Kissimmee for homes inside city limits, on whether your project needs a permit.
Upkeep and drainage
Leaves, pollen and where the water goes
Mature southern live oaks reach 60 to 80 feet in height and can spread as wide as 120 feet, and the leaves they drop are notorious for clogging gutters. Needle drop is heaviest between September and November. Trees release pollen from January through June, with the heaviest load arriving in March and April.
A workable rhythm under oaks and pines is late April to May, before the June to September storms, and again after the autumn needle peak in late November or December. NRCA also advises checking the roof in fall and spring and clearing gutters filled with dead leaves.
Where the water goes depends on the lot. Reading the Kissimmee rainfall total as an inference, a roof there sheds thousands of gallons a year, so extend downspouts past the 1-foot minimum if your yard slopes toward the slab.
Rain on your roof
How much water an Osceola County roof sheds
Rain on your roof
Preset: 6.1 inches, the 10-year 24-hour rain (NOAA Atlas 14 at Orlando, the nearest point in our data).
7,601 gallons run off that roof, all of it toward the gutters and downspouts.
Math: square feet × inches × 0.623 gallons.
Roof cost estimator
See a ballpark for your roof
Answer a few questions about your roof and see a ballpark built from published Florida cost data, then get your written estimate.
Ranges come from published Florida cost guides. They are not South Fork Roofing's prices.
Questions
Gutters in Osceola County: questions
How far must a downspout discharge from my house in Osceola County?
At least 1 foot from the sidewall. Under Florida Building Code Residential R318.5, water can be routed by underground pipe, a tail extension or a splash block. The rule sits in a termite-protection section, so keeping roof water away from the foundation does double duty. In a county where Hurricane Ian flooded 3,200 residential structures, longer runs on low lots are a sensible choice.
Source: 2023 Florida Building Code, Residential, 8th ed., R318.5 (UpCodes viewer, unofficial transcription); FBC-Building 1503.7, read Oct 5, 2026
Do all houses in Osceola County need gutters?
Not all. Florida code requires gutters with downspouts on buildings whose eaves project less than 6 inches, except at gable end rakes or on a roof above another roof. Homes with deeper eaves may be exempt. With 60.5 percent of county homes single-family detached, many fall under the rule. Confirm your case with the Osceola County Building Office.
Source: 2023 Florida Building Code, Residential, 8th ed., R318.5 (UpCodes viewer, unofficial transcription); FBC-Building 1503.7, read Oct 5, 2026
What size gutter handles Kissimmee rain?
A 6-inch half-round gutter carries 110 gallons a minute at a 1/8 inch per foot slope, against 74 for a 5-inch. Kissimmee gets 52.57 inches of rain a year, and the 5-minute rate in a 10-year storm is 8.71 inches an hour at Orlando. Those short bursts are why the larger size is often the better pick on a long roof.
Source: 2023 Florida Building Code, Plumbing, 8th ed., Chapter 11 (UpCodes viewer, unofficial transcription), read Oct 5, 2026
How often should I clean gutters under oak and pine trees?
Clean them no less than twice yearly, and do it more often when the canopy overhead is dense. Cleaning in late April to May, before the June to September storms, and after the autumn pine needle peak is a common schedule. Kissimmee gets 24.77 inches of rain in June through August, so a clog in early summer causes real trouble.
Source: ask.ifas.ufl.edu, read Oct 5, 2026
Do gutter screens remove the need to clean?
No. Consumer Reports found fine-mesh screens outperformed those with larger holes, but even the top screen was only middling in a severe downpour. Maintenance still remained, and screens may need brushing in high-pollen areas. In Osceola County, pollen season runs January to June, so expect to check them in spring.
Source: consumerreports.org, read Oct 5, 2026
Can a roofer replace my fascia along with the gutters?
Roofing contractors may repair or replace fascia as needed during roof repair or replacement. Gutter-only work is less clear. The Specialty Structure scope lists siding, soffit, fascia and gutters, but local licensing practice differs. Ask the Osceola County Building Office or your city whether a permit or specific license applies.
Source: law.cornell.edu, read Oct 5, 2026
Osceola County
More in Osceola County
Sources for this page(44)
- 1.NOAA NCEI, U.S. Climate Normals 1991-2020 (annual/seasonal), access-data API. Read Oct 5, 2026.
- 2.U.S. Census Bureau, 2020 Census (TIGERweb tigerWMS_Census2020 MapServer: POP100, HU100, AREALAND, AREAWATER). Read Oct 5, 2026.
- 3.Water share of total area: 11.9%. U.S. Census Bureau, 2020 Census (TIGERweb tigerWMS_Census2020 MapServer: POP100, HU100, AREALAND, AREAWATER). Read Oct 5, 2026.
- 4.NWS Melbourne, Post Tropical Cyclone Report: Hurricane Ian (2022). Read Oct 5, 2026.
- 5.Hurricane Ian (2022). NWS Melbourne, Post Tropical Cyclone Report: Hurricane Ian (2022). Read Oct 5, 2026.
- 6.City of St. Cloud, Permit Information (Building Department). Read Oct 5, 2026.
- 7.City of St. Cloud, Historic Preservation. Read Oct 5, 2026.
- 8.Single-family detached share of housing units: 60.5%. U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API. Read Oct 5, 2026.
- 9.U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API, table B25024. Read Oct 5, 2026.
- 10.Median year homes were built: 2002. U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API. Read Oct 5, 2026.
- 11.Share of homes built 2010 or later: 27.4%. U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API. Read Oct 5, 2026.
- 12.Share of homes built before 1980: 11.3%. U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API. Read Oct 5, 2026.
- 13.NWS Melbourne, Milton tornado list (CSV). Read Oct 5, 2026.
- 14.U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API, tables B25034/B25035. Read Oct 5, 2026.
- 15.Osceola County, Building and Permits. Read Oct 5, 2026.
- 16.Permit office: Osceola County Building Office (Building and Permits). Osceola County Building Office (Building and Permits). Read Oct 10, 2026.
- 17.City of Kissimmee, Permits & Inspections. Read Oct 5, 2026.
- 18.NOAA National Centers for Environmental Information. Read Oct 5, 2026.
- 19.2023 Florida Building Code, Plumbing, 8th ed., Chapter 11 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from COM-20 (the research cites it "as COM-20").
- 20.NOAA Atlas 14 (HDSC Precipitation Frequency Data Server). Read Oct 5, 2026.
- 21.2023 Florida Building Code, Residential, 8th ed., R318.5 (UpCodes viewer, unofficial transcription); FBC-Building 1503.7. Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7).
- 22.2023 Florida Building Code, Residential, 8th ed., Chapter 8 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from NC-2 (the research cites it "as NC-2").
- 23.2023 Florida Building Code, Residential, 8th ed., Chapter 9 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from COM-29 (the research cites it "as COM-29").
- 24.ask.ifas.ufl.edu. Read Oct 5, 2026.
- 25.ufdcimages.uflib.ufl.edu. Read Oct 5, 2026.
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- 27.National Roofing Contractors Association. Read Oct 5, 2026.
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- 35.Citizens Property Insurance Corporation, inspections FAQ (updated 2026-03-17), Citizens Property Insurance. Read Oct 4, 2026.
- 36.FRSA, "New 2023 FBC Eighth Edition is Now in Effect", 2024-02-13, floridaroof.com. Read Oct 5, 2026.
- 37.Miami-Dade County RER notice, Miami. Read Oct 5, 2026.
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- 39.2023 Florida Building Code, Building, 8th ed., Chapter 1 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
- 40.Florida Statutes, section 713.135 (2026), Florida Legislature. Read Oct 5, 2026.
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- 43.Florida Statutes, section 489.113 (2026), Florida Legislature. Read Oct 5, 2026.
- 44.NOAA Atlas 14 at Orlando, the nearest point in our data: 8.71 in/hr (5-minute, 10-year). NOAA Atlas 14 Volume 9 (Southeastern States) version 2, partial-duration series point estimates, via the HDSC PFDS endpoint (ops/research/v3/services/data/noaa-atlas14-florida-rainfall.tsv). Read Oct 5, 2026.
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Gutters in Osceola County
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